[volt-nuts] Best cleaning procedure for precision cirquits

J. Forster jfor at quik.com
Sun Sep 26 02:53:29 UTC 2010

Acetone will remove the white haze.



> Hi Andreas,
> In my opinion, 99% (or 91%) isopropyl alcohol is the most
> ideal PCB cleaning solvent available to us today.
> I keep three bottles of isopropyl alcohol in my shop.
> One dirty with rosin, one mostly clean, and one fresh 99%
> alcohol.
> After I assemble new boards, I soak and scrub them with the
> dirty alcohol, then after shaking dry, I wash them with the
> mostly clean alcohol, shake dry, and then wash with the fresh
> 99% alcohol.  After shaking the alcohol off, I blow dry the
> boards with compressed air.
> When I rework a previously built board, I use fresh 99%
> alcohol for the first wash and scrub, and for the last rinse.
> I always blow dry with compressed air as it blows away the
> alcohol rather than letting it evaporate and leave behind
> a residue.
> -Chuck Harris
> Andreas Jahn wrote:
>> Hello all,
>> currently I am soldering my first LTZ1000A reference board.
>> Up to now I am cleaning my precision boards after soldering with
>> denatured alcohol in a pre-washing and a main washing procedure.
>> After this the last washing stage is with clean water to get rid of the
>> white haze from the denatured alcohol.
>> What is the best cleaning procedure? Is there one in a repair manual of
>> any precision instrument?
>> Which of the near best procedure can be done at a home?
>> What are You doing to clean the boards?
>> best regards
>> Andreas
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